21443240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:211

約数の個数: 128

約数和(自身を含む): 61205760

約数和(自身を除く): 39762520

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 43, 52, 56, 65, 70, 86, 91, 104, 130, 137, 140, 172, 182, 215, 260, 274, 280, 301, 344, 364, 430, 455, 520, 548, 559, 602, 685, 728, 860, 910, 959, 1096, 1118, 1204, 1370, 1505, 1720, 1781, 1820, 1918, 2236, 2408, 2740, 2795, 3010, 3562, 3640, 3836, 3913, 4472, 4795, 5480, 5590, 5891, 6020, 7124, 7672, 7826, 8905, 9590, 11180, 11782, 12040, 12467, 14248, 15652, 17810, 19180, 19565, 22360, 23564, 24934, 29455, 31304, 35620, 38360, 39130, 41237, 47128, 49868, 58910, 62335, 71240, 76583, 78260, 82474, 99736, 117820, 124670, 153166, 156520, 164948, 206185, 235640, 249340, 306332, 329896, 382915, 412370, 498680, 536081, 612664, 765830, 824740, 1072162, 1531660, 1649480, 2144324, 2680405, 3063320, 4288648, 5360810, 10721620, 21443240]

約数ペア:

[(1, 21443240), (2, 10721620), (4, 5360810), (5, 4288648), (7, 3063320), (8, 2680405), (10, 2144324), (13, 1649480), (14, 1531660), (20, 1072162), (26, 824740), (28, 765830), (35, 612664), (40, 536081), (43, 498680), (52, 412370), (56, 382915), (65, 329896), (70, 306332), (86, 249340), (91, 235640), (104, 206185), (130, 164948), (137, 156520), (140, 153166), (172, 124670), (182, 117820), (215, 99736), (260, 82474), (274, 78260), (280, 76583), (301, 71240), (344, 62335), (364, 58910), (430, 49868), (455, 47128), (520, 41237), (548, 39130), (559, 38360), (602, 35620), (685, 31304), (728, 29455), (860, 24934), (910, 23564), (959, 22360), (1096, 19565), (1118, 19180), (1204, 17810), (1370, 15652), (1505, 14248), (1720, 12467), (1781, 12040), (1820, 11782), (1918, 11180), (2236, 9590), (2408, 8905), (2740, 7826), (2795, 7672), (3010, 7124), (3562, 6020), (3640, 5891), (3836, 5590), (3913, 5480), (4472, 4795)]